Schedule of Carrying Amount of Goodwill (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 173,070	$ 173,477
Accumulated impairment losses	(7,578)	(4,481)
Disposition	(6,296)	0
Net carrying amount	$ 159,196	$ 168,996	$ 80,757